Has little or nothing to do with anticipated results. It's not limited to sports or competition. You can choke on an assignment for work, choke in an attempt to seduce a crush of yours. Jordan missing a free throw. You can choke anywhere, anytime.
Choking is when you had control, and failed to execute.

What happens is you are suppose to be focused on what your eyes are viewing. But your weak mind chooses to worry about something negative whether real or not, past or future.

It's bigger than that

Michael Jordan would be considered one of the most clutch professional sports players of all time.
Only you know when you choke. Its a distinct feeling. Choking doesn't give a crap about expectations.

n. A small hole in a pipe, bong, or other smoking device with a smoke holding chamber. Located at the end of the chamber farthest from the smoker's mouth. A thumb or finger is placed over the hole during the initial inhalation so that smoke can be sucked into the holding chamber. After the chamber is filled with smoke, the choke is released and the smoke sucked out of the chamber with fresh air rushing in through the carb to displace it.

Shit man, you lied. You've never smoked before. You didn't even know enough to hold the choke!